Rosalia.Thanks in advance,Dear FSL experts,It is fine if at the same time that I use -B to correct for Bias Fiel, I useĀ -P, --Prior (MNI-maxprob-thr50-2mm.nii.gz) as a FLIRT registration in order to improve my image and proceed with BET before doing fslvbm? Authomatic BET with fslvbm did not work well for all my images....